
Surveyor flags are brightly coloured flags attached to thin metal rods or stakes. They are used to identify, locate and mark features on the land that need to be measured and recorded before land can be developed. Surveyor flags are sometimes referred to as streamers and are attached to trees, fences, or stakes placed by the survey. The different colours of the flags represent different technologies, and they can also have symbols on them to explain what the surveyor found in that spot.
| Characteristics | Values |
|---|---|
| Purpose | To identify, locate and mark features on the land that need to be measured and recorded before land can be developed |
| Attachment | Flags are attached to thin metal rods, trees, fence posts, or stakes |
| Colours | Red, orange, pink, white, yellow, blue, purple, and green |
| Symbolism | Colours and symbols on the flags explain what the surveyor found in that spot |
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What You'll Learn
- Survey flags are used to identify, locate and mark features on the land that need to be measured and recorded before land can be developed
- The flags come in different colours, each representing a different technology
- Surveyor flags are sometimes referred to as streamers and are attached to trees, fences, or stakes
- Flags with no markings may be part of a path or a proposed work site
- Red flags indicate electric power lines, cables, conduit and lighting cables

Survey flags are used to identify, locate and mark features on the land that need to be measured and recorded before land can be developed
The flags come in a variety of colours, with red, orange and pink being the most common. Each colour has a different meaning, with red flags marking the ground to signify conventional varieties with no herbicide technology traits, and white flags representing the presence of Roundup Ready™ technology. Yellow flags mark areas of natural gas, oil, steam, petroleum or gaseous materials, while blue flags mean potable water. Purple flags indicate reclaimed water and irrigation lines, and orange flags indicate communication lines, alarm/signal lines, cables, or conduit. Green flags are used to indicate sewers and drain lines.
The flags are used to identify survey points, boundary lines, and potential hazards, ensuring that the surveyor's work is efficient and accurate. They are also used to mark the correct road or turn, or to signal a proposed or approximate location for future work.
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The flags come in different colours, each representing a different technology
Surveyor flags are attached to trees, fences, or stakes placed by the survey. They come in different colours, each representing a different technology.
Red flags mark the ground to signify conventional varieties with no herbicide technology traits. They also indicate electric power lines, cables, conduit and lighting cables. Extreme caution should be taken when approaching an area with red flags.
White flags represent the presence of Roundup Ready™ technology, which is tolerant to glyphosate or Roundup® herbicide. They are also used to mark areas of proposed excavation, generally found at construction sites.
Pink markings are temporary survey markings.
Yellow marks areas of natural gas, oil, steam, petroleum or gaseous materials.
Blue means potable water (good for human consumption).
Purple indicates reclaimed water and irrigation lines.
Orange flags indicate communication lines, alarm/signal lines, cables, or conduit.
Green indicates sewers and drain lines.
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Surveyor flags are sometimes referred to as streamers and are attached to trees, fences, or stakes
The colours of surveyor flags each have a different meaning. Red flags mark the ground to signify conventional varieties with no herbicide technology traits and indicate caution. They also indicate electric power lines, cables, conduit and lighting cables. White flags represent the presence of Roundup Ready™ technology and areas of proposed excavation, generally found at construction sites. Orange flags indicate communication lines, alarm/signal lines, cables, or conduit. Yellow marks areas of natural gas, oil, steam, petroleum or gaseous materials. Blue means potable water (meaning good for human consumption). Purple indicates reclaimed water and irrigation lines. Green indicates sewers and drain lines.
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Flags with no markings may be part of a path or a proposed work site
Surveyor flags, also known as streamers, are attached to trees, fences, or stakes. They are brightly coloured and are used to identify survey points, boundary lines, and potential hazards. They can also be used to indicate the correct road or turn.
The colours of the flags have different meanings. Red flags mark the ground to signify conventional varieties with no herbicide technology traits and indicate caution. White flags represent the presence of Roundup Ready™ technology, which is tolerant to glyphosate or Roundup® herbicide. White flags also indicate areas of proposed excavation, generally found at construction sites. Pink markings are temporary survey markings. Yellow marks areas of natural gas, oil, steam, petroleum or gaseous materials. Blue means potable water (good for human consumption). Purple indicates reclaimed water and irrigation lines. Orange flags indicate communication lines, alarm/signal lines, cables, or conduit. Green indicates sewers and drain lines.
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Red flags indicate electric power lines, cables, conduit and lighting cables
Surveyor flags, also known as streamers, are attached to trees, fences, or stakes placed by the survey. They are brightly coloured and used to identify, locate and mark features on the land that need to be measured and recorded before land can be developed.
Other colours have different meanings. White flags represent the presence of Roundup Ready™ technology, which is tolerant to glyphosate or Roundup® herbicide. White markers are also used to indicate areas of proposed excavation, generally found at construction sites. Pink markings are temporary survey markings. Yellow marks areas of natural gas, oil, steam, petroleum or gaseous materials. Blue means potable water (meaning good for human consumption). Purple indicates reclaimed water and irrigation lines. Orange flags indicate communication lines, alarm/signal lines, cables, or conduit. Green indicates sewers and drain lines.
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Frequently asked questions
Each colour represents a different technology. For example, red flags indicate electric power lines, cables, conduit and lighting cables, while white flags represent the presence of Roundup Ready™ technology.
Survey flags are attached to the ground to identify, locate and mark features on the land that need to be measured and recorded before land can be developed.
Flags with no markings could mean that it is part of a path or a proposed work site.
Survey flags attached to trees are used to make them visible above the weeds.











































